Holo-krome 720003810 Hex Socket Cap Screw 1-8 Unc

Product Description

The HOLO-KROME 720003810 is a hex socket cap screw designed for high-strength fastening applications in industrial, mechanical, and trade assembly work. The screw features a 1-8 UNC thread size and measures 3.75 inches under the head with partial threading. It is driven by a 3/4 inch hex socket and is manufactured from alloy steel with a black oxide finish for corrosion resistance and reduced surface reflectivity. At 1.08 pounds per unit, this is a heavy-duty fastener suited for structural and mechanical connections where tensile strength and precise torque retention matter.

This fastener is used in applications requiring UNC coarse-thread engagement with a socket drive, including machinery assembly, structural brackets, equipment frames, and heavy mechanical components. The alloy steel construction and black oxide coating make it appropriate for indoor mechanical environments and lightly protected outdoor assemblies. Machinists, millwrights, industrial maintenance technicians, and mechanical contractors are the typical installers for this screw type.

Key Features

• 1-8 UNC coarse thread for strong mechanical engagement
• 3.75 inches length under head with partial threading
• 3/4 inch hex socket drive for high-torque installation
• Alloy steel construction for high tensile and shear strength
• Black oxide finish provides mild corrosion resistance and low-glare appearance
• Meets ASME B18.3 and ASTM A574 fastener standards

Compatibility

Designed as an OEM-style replacement or direct-fit hex socket cap screw for applications requiring a 1-8 UNC partially threaded fastener with a 3/4 inch hex drive and 3.75 inch length under head.

Installation Notes

Installation requires a calibrated torque wrench and the correct 3/4 inch hex key or socket bit to achieve proper seating without stripping the drive recess. Always ensure mating threads are clean and free of debris before installation. Follow applicable torque specifications from the equipment manufacturer or relevant ASME standards for the specific joint design. Wear appropriate PPE when working with high-strength fasteners under load.